Miss Teeny

Since MK turned three, we now go to WW for her OT twice a week. She had been a little jealous of Felix going to school, so I told her that this was her school. One of her teacher's names is Tina. Last week I heard this conversation between Felix and MK...
Felix: I go to school.
MK: I go to school too!
Felix: What's you teacher's name?
MK: Teeny
Felix: (cracks up laughing) Teeny!
MK: (yells angrily at Felix) Don't laugh at me!